branch versioning

Hi,

How do you guys manage versions of a topic branch? I usually end up saving format-patch series somewhere or forget all old versions. Although I really want to keep old versions around. reflog to me is polluted with every kind of branch updates. And it's local information. It can't be transferred to another repo (or can it?)

On the same subject, I have quite a few old topic branches that I rarely touch. I don't want to remove them. I just want to hide them away from "git branch". I've been thinking of "attic/" namespace that "git branch" by default will not show. Just wondering if other people face the same problem..